This animated visualization displays the solar system’s planets with sizes to scale but not distances, using D3 v7 transitions to sequentially reveal each body. Data from Wikipedia’s list of gravitationally rounded objects drives circle radii, positions, and labels, while `d3.select`, `transition`, and `easeLinear` handle the staggered entrance and updates. Three planets (Jupiter, Saturn, Uranus) use SVG linear gradients defined via `linearGradient` elements, with horizontal or vertical stops that simulate banding or atmospheric tints. The Sun and smaller planets use flat fill colors, and the black background highlights each object’s appearance.